Annex E (informative) — Row budget

A planning worksheet for one row, with a schema and a validator. EIS does not require an enclosure to publish it. The rows behind it are ENC-001 (width and clear depth), PWR-001 and PWR-002 (the currents each power entry and outlet publishes, 6.1), BUS-012 (a bus board's per-header limit), SUP-001 (supply ripple), and ASM-001 (the installer's sum).

A row is budgeted per power interface (6.1): the bus and PWR-DC12, each where a source of that interface feeds modules in the row. Each interface's sources are listed with their totals (+12 V, −12 V; +5 V optional on the bus; 12 V: one +V and −V pair on PWR-DC12), and each module with its draw on each interface it uses.

The row

Field Source
Row id or name Maker
Width (HP) ENC-001
Clear depth behind the panel (mm) ENC-001
Video sync distribution None, or VID-75 (a coaxial tree)

Sources, one line each, per power interface

Field Source
Power interface PWR-BUS or PWR-DC12 (6.1)
Source Bus board, supply, or a product with PWR-DC12 outlets
Total on each rail of the interface (A) PWR-002
Outlets, and the limit at each (A); a bus board header at most 1.5 A per rail PWR-002, BUS-012
Ripple and noise, mV peak-to-peak (a supply) SUP-001

Modules

Field Source
HP and depth PANEL-003
Draw on each power interface and rail (A) PWR-001

On each power interface and rail, the modules' sum stays within every source on that interface, and each module's draw within the limit of its outlet (ASM-001). For a module that publishes no −12 V current, 9.1 recommends planning 50 % of its +12 V current.

EIS · A row's current budget on the bus: the example row 'performance' +12 V 0.58 A of modules, 3.42 A left bus board and supply 4 A −12 V 0.375 A of modules, 2.125 A left bus board and supply 2.5 A +5 V 0.00 A of modules, 2.00 A left bus board and supply 2 A Audio I/O: +12 V 0.12 A, −12 V 0.08 A Mixer: +12 V 0.18 A, −12 V 0.12 A VCO: +12 V 0.09 A, −12 V 0.05 A VCF/VCA: +12 V 0.08 A, −12 V 0.06 A Envelope/LFO: +12 V 0.06 A, −12 V 0.04 A MIDI utility (Type A): +12 V 0.05 A, −12 V not published A module goes into a row only while each rail's sum stays within the bus board's totals, its per-header limit, and the supply's rating (ASM-001). The dashed segment is the module with no published −12 V figure, planned at 50 % of its +12 V draw, as EIS recommends.

Machine-readable example

data/examples/row_budget_two_row.yaml describes a two-row instrument; data/row_budget.schema.json is its schema. Check it with:

python tools/row_budget.py --check data/examples/row_budget_two_row.yaml